All-photonic quantum key distribution beyond the single-repeater bound
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arXiv
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| Autores principales: | , , , , |
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| Formato: | Preprint |
| Publicado: |
2026
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| Acceso en línea: | |
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| _version_ | 1866908974319665152 |
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| author | Winnel, Matthew S. Juárez, Sergio Perumangatt, Chithrabhanu Paraiso, Taofiq Stevenson, R. Mark |
| author_facet | Winnel, Matthew S. Juárez, Sergio Perumangatt, Chithrabhanu Paraiso, Taofiq Stevenson, R. Mark |
| contents | Quantum protocols require classical signaling, and when classical signals propagate faster than quantum ones, standard rate-loss limits can be surpassed. We introduce an all-photonic measurement-device-independent quantum key distribution protocol that exceeds the single-repeater bound without error correction. When quantum signals travel at two-thirds the classical speed, the key rate scaling approaches $η^{2/5}$. We propose a single-rail, temporally multiplexed architecture that extends twin-field-type protocols to multiple nodes and surpasses their key rate without ideal quantum memories. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2604_16174 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | All-photonic quantum key distribution beyond the single-repeater bound Winnel, Matthew S. Juárez, Sergio Perumangatt, Chithrabhanu Paraiso, Taofiq Stevenson, R. Mark Quantum Physics Quantum protocols require classical signaling, and when classical signals propagate faster than quantum ones, standard rate-loss limits can be surpassed. We introduce an all-photonic measurement-device-independent quantum key distribution protocol that exceeds the single-repeater bound without error correction. When quantum signals travel at two-thirds the classical speed, the key rate scaling approaches $η^{2/5}$. We propose a single-rail, temporally multiplexed architecture that extends twin-field-type protocols to multiple nodes and surpasses their key rate without ideal quantum memories. |
| title | All-photonic quantum key distribution beyond the single-repeater bound |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2604.16174 |